[OAK-2137] Lucene: change path indexing and querying

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Component/s: lucene
• Assignee: Chetan Mehrotra
• Reporter: Thomas Mueller
• Created: 25/Sep/14 12:40
• Updated: 20/Apr/15 07:30
• Resolved: 15/Mar/15 05:31

Description

Currently, the queries can not use the path restriction as described in OAK-2134. Using Lucene for the path restriction would be nice, but requires some more work. Two solutions to investigate are:

• (a) only index the path prefix (for example, the 20 first characters of the path, or only the first 5 path entries), and

• (b) also index all parent paths of a node (not store those in the document; just index them); when querying, use an exact match for the parent.

Solution (a) will reduce the index size in most cases, but is not guaranteed to always solve the problem, if there are many nodes that have distinct short path (for example, a counter node near the root node).

Solution (b) will increase the index size (how much needs to be tested), and would solve the problem.

Issue Links

• duplicates: OAK-2306 Path restriction evaluation support within LucenIndex